Electric-lamp socket.



H. T. HARTWIG. ELECTRIC LAMP SOCKET. APPLICATION FILED DIS-0.14, 1919.

1 ,028,7 1 9; Patented June 4, 1912.

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UNITED STATES PATENT @FFIfiE.

HERMAN T. HARTWIG, OF HARTFORD, CONNECTICU '1, ASSIGNOR TO THE ARROW ELEC- TRIC COMPANY,-OF HARTFORD, CONNECTICUT, ACORPORATION OF CONNECTICUT.

ELECTRIC-LAMP SOCKET.

Specification of Letters Patent.

Patented June 4, 1912.

Application filed December 14, 1910. Serial No. 597,244.

To all whom it may concern:

Be it known that I, HERMAN T. I'IARTWIG, a citizen of the United States of America, and residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Electric-Lamp Sockets, of which the following is a specification. i My invention relates to electric lamp sockets and the like and particularly to the insulating lining therefor, the object of my invention being to provide means for taking up the play between the usual shell and socket body where the latter is undersized, and more particularly by specially forming the usual" insulating lining for this purpose so that the socket body will be held snug within the shell in spite of variations in its size.

In the accompanying drawings, Figure 1 is a side elevation of a socket partially broken away showing my invention in one form; Fig. 2 is a plan thereof with the cap removed; Fig. 3 is aperspective of the lining; and Fig. 4 is a side elevation of a modified form of the lining.

The socket illustrated is of connnon type comprising metallic shell and cap A and B inclosing an insulating body here shown as comprisingtwo porcelain buttons a and 6 between which is located a suitable switch mechanism (not shown) operated by the key C. To insulate the shell from any electrically live parts on the socket body and the leadingin wires, itis customary to sepa rate the same by a substantially cylindrical lining of paper or other suitable non-conducting composition which conforms to the. internal contour of the shell. lVhile this lining serves its function as an insulator very satisfactorily, no provision has heretofore been made, especially never in connection with said lining, to take up the lost motion between the body and the'lined shell which frequently results from unavoidable variations in the size of the porcelain body parts. This variation is such that not in frequently the socket body has so considerable a play within the shell that it is objectionable from a technical standpoint, while always affecting the marketability of the I now propose to obviate this difiiculty by providing means, particularly in connection with the lining. to take up the play between the shell and the socket body when the latter is undcrsize. In the form shown in Figs. 1, 2 and 3 I accomplish this by corrugating the portion (5 of the lining D which embraces the porcelain of the body sockets, when the lining is slotted as at X (Fig. 3), the edges of the lining adjacentthe slotare -reaclily pressed slightly together, thus adding still further to the resiliency of the lining.

Obviously my object may be accomplished in other ways and the lining maybe offset in many diflerentways to space the inner and outer bearing faces apart a greater distance than the normal thickness of the material, and I do not limit myself to the precise forms shown for accomplishing this result.

I claim as my invention 1. In an electric lamp socket, resilient means interposed between the shell and body. for taking up play between the latter.

2. An electric lamp socket comprising an inclosing casing and a porcelain socket body within the same, in combination with an insulating lining interposed between said casing and socket body and having its inner and outer bearing faces resiliently spaced apart to take up play between the shell and the socket body whenthe latter is undersized, substantially as described.

3. An electric lamp socket comprising an inclosing casing and a porcelain socket body within the same carrying a screw shell to receive a lamp base, in combination with an insulating lining separating said casing from the socket body and screw shell, the portion of said lining surrounding said porcelain bodyhaving its inner and outer receive a lamp base, in combination with radially a greater distance than the normal bearing faces spaced apart radially a greater distance than .the normal thickness, of said lining to take up pla'ybetween the undersized. I by 4. An electric lamp socket comprisingfan inclosing casing and a porcelain socket. body within the same carrying'a screw shell toan insulating lining for said casing, said liningcomprising a plain cylindrical portion surrounding the screw shell and a portion of greater diameter "surrounding the socket body, the latter portion having its inner and outer bearing faces spaced apart thickness of said lining to take up play he- Gopies of this patent may be obtained for tween the vcasing and said body, substantially as described.

5. A lining for electric lamp sockets havcasing and said body when the latter is ri' ing the inner and outer bearing faces there'- of spaced radially apart a greater distance than the normal thickness of said lining to take up play between the casing and the socket body, said lining being longitudinally slotted to receive the stem of a switch key, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses.

' I HERMAN T. HARTWIG.

Witnesses:

H. M. SAUNDERS, BENJ. PERKINS.

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

